Anthropic’s Claude Sonnet 4.5 Can Code Autonomously for 30+ Hours

Anthropic may be using its specialization in coding and STEM as a differentiator in the buzzy frontier model market.

Anthropic has thrown down another gauntlet in the AI fight with Claude Sonnet 4.5, a model that the company claims excels at coding. Claude Sonnet 4.5 is claimed to perform better than its predecessors at writing production-ready code, using computers, performing cybersecurity tasks, and researching, modeling, and forecasting for financial services.

“Claude Sonnet 4.5 resets our expectations — it handles 30+ hours of autonomous coding, freeing our engineers to tackle months of complex architectural work in dramatically less time while maintaining coherence across massive codebases,” said Sean Ward, chief executive officer and co-founder of iGent AI, in Anthropic’s announcement.

Claude Sonnet 4.5 excels at coding

Enabling an AI to work independently for so long suggests Anthropic might deliver on the promise of an AI coworker. Claude Sonnet ...